Two-in-one reinforced geogrid

ABSTRACT

A two-in-one reinforced geogrid includes a primary fabric and a non-woven fabric fixed onto the primary fabric to together with the primary fabric produce an enhanced retaining strength. The non-woven fabric has a plurality of fine pores, which have sizes allowing water but not sand and grit to pass therethrough, and therefore effectively avoid river silting and mudflows. The two-in-one reinforced geogrid is convenient for using on different land surfaces, and may be advantageously folded and fixed at a slope to stabilize the land structure.

FIELD OF THE INVENTION

The present invention relates to a reinforced geogrid, and more particularly to a two-in-one reinforced geogrid that has enhanced retaining strength and allows water but not sand and grit to pass therethrough.

BACKGROUND OF THE INVENTION

A conventional geogrid 10 is shown in FIG. 1. The geogrid 10 includes a plurality of large meshes, which are formed by polyester bundles 11 arranged in warp and weft directions to intersect with one another. In the large meshes, a plurality of small meshes 12 is further formed by weaving a plurality of warp and weft material, so as to stop and retain mud and stone.

When the geogrid 10 is used at slopes, fine sand and grit may still pass through the small meshes 12. Since the small meshes 12 are formed by weaving thinner warp and weft material, they do not provide sufficient retaining strength to stop excessive amount of sand and grit and tend to break. Sand and grit passing through the geogrid 10 via the small meshes 12 result in river silting and mudflows. In brief, the conventional geogrid 10 fails to provide the function of soil and water reservation. When a non-woven fabric having smaller meshes is used with the large meshes of the conventional geogrid 10, the non-woven fabric has low washout resistance and is easily damaged to have shortened service life.

SUMMARY OF THE INVENTION

A primary object of the present invention is to provide a two-in-one reinforced geogrid that has enhanced retaining strength and allows water but not sand and grit to pass therethrough, so as to effectively avoid river silting and mudflows.

To achieve the above and other objects, the two-in-one reinforced geogrid according to the present invention includes a primary fabric having a plurality of large and small meshes, and a non-woven fabric having a plurality of fine pores. The non-woven fabric is fixed onto the primary fabric to together with the primary fabric produce an enhanced retaining strength. The fine pores on the non-woven fabric have sizes allowing water but not sand and grit to pass therethrough, and therefore effectively separate water from sand and grit to avoid river silting and mudflows.

BRIEF DESCRIPTION OF THE DRAWINGS

The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein

FIG. 1 is a front view of a conventional reinforced geogrids;

FIG. 2 is a front view of a two-in-one reinforced geogrid according to the present invention;

FIG. 3 is a sectional view of a primary fabric for the two-in-one reinforced geogrid of the present invention;

FIG. 4 is a front view of a non-woven fabric for the two-in-one reinforced geogrid of the present invention; and

FIG. 5 is a rear view of the two-in-one reinforced geogrid of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIG. 2. A two-in-one reinforced geogrid according to the present invention includes a primary fabric 20 and a non-woven fabric 30.

FIG. 3 is a sectional view of the primary fabric 20 for the two-in-one reinforced geogrid of the present invention. As shown, the primary fabric 20 includes a plurality of large meshes 21 and a plurality of small meshes 22. The large meshes 21 are formed using polyester fiber bundles that are arranged in warp and weft directions to lap and intersect one another, and then fixed in place by weaving. When weaving at the lapped locations, a biaxial knitted fabric is used for weaving. In the case a single yarn is used, a temporary weaving is adopted. Finally, the polyester warp and weft yarns 23 located at outer edges of the woven primary fabric 20 are molten to form the large meshes 21 defined by the crossed warp and weft fiber bundles. In the large meshes 21, a plurality of thin warp and weft wires are woven to form the small meshes 22. When weaving, more than one group of thin wires is added in both the warp and the weft directions.

FIG. 4 is a front view of the non-woven fabric 30 for the two-in-one reinforced geogrid of the present invention. The non-woven fabric 30 is associated with an environment-friendly resin, and includes a plurality of fine pores 31, the sizes of which are large enough for water but not sand and grit to pass therethrough. The non-woven fabric 30 associated with the environment-friendly resin has good washout resistance and does not cause public hazards.

FIG. 5 is a rear view of the two-in-one reinforced geogrid of the present invention. The non-woven fabric 30 associated with the environment-friendly resin is laid over and woven onto the primary fabric 20 to form the two-in-one reinforced geogrid with enhanced retaining strength.

When the two-in-one reinforced geogrid of the present invention in a complete sheet form is spread on a land surface, the primary fabric 20 having the non-woven fabric 30 woven thereto provides increased retaining strength without the risk of having broken small meshes 22 due to excessive load of sand and grit. Moreover, since the fine pores 31 of the non-woven fabric 30 allow only water but not sand and grit to flow therethrough, the two-in-one reinforced geogrid of the present invention effectively separates water from sand and grit to avoid river silting and mudflows.

In conclusion, the two-in-one reinforced geogrid according to the present invention is helpful in soil and water reservation and different geotechnical problems, and is convenient for using. It may be advantageously folded and fixed at a slope, giving the land a stable structure to achieve the purpose of soil and water reservation. 

1. A two-in-one reinforced geogrid, comprising: a primary fabric having a plurality of large meshes and a plurality of small meshes; and a non-woven fabric having a plurality of fine pores; the non-woven fabric being fixed onto the primary fabric to together with the primary fabric provide an enhanced retaining strength; and the fine pores on the non-woven fabric having sizes large enough for water but not sand and grit to pass therethrough to effectively separate water from sand and grit and thereby avoid river silting and mudflows.
 2. The two-in-one reinforced geogrid as claimed in claim 1, wherein the large meshes on the primary fabric are formed using a plurality of polyester fiber bundles that are arranged in warp and weft directions to intersect with one another.
 3. The two-in-one reinforced geogrid as claimed in claim 1, wherein the small meshes on the primary fabric are formed by weaving a plurality of thin wires.
 4. The two-in-one reinforced geogrid as claimed in claim 1, wherein the non-woven fabric is associated with an environment-friendly resin to produce increased washout resistance without causing public hazards. 